7381215851 has 2 divisors, whose sum is σ = 7381215852. Its totient is φ = 7381215850.

The previous prime is 7381215841. The next prime is 7381215899. The reversal of 7381215851 is 1585121837.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7381215851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7381215799 and 7381215808.

It is not a weakly prime, because it can be changed into another prime (7381215841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3690607925 + 3690607926.

It is an arithmetic number, because the mean of its divisors is an integer number (3690607926).

Almost surely, 2^7381215851 is an apocalyptic number.

7381215851 is a deficient number, since it is larger than the sum of its proper divisors (1).

7381215851 is an equidigital number, since it uses as much as digits as its factorization.

7381215851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67200, while the sum is 41.

The square root of 7381215851 is about 85914.0026479968. The cubic root of 7381215851 is about 1947.0449082874.

The spelling of 7381215851 in words is "seven billion, three hundred eighty-one million, two hundred fifteen thousand, eight hundred fifty-one".